类钙钛矿结构新钽酸盐KSr_2Ta_3O_(10)的合成、结构与层间特性  

Synthesis, Structure and Interlayer Behavior of A New Tantalate KSr_2Ta_3O_(10) with Perovskite-like Structure

作　　者：方亮[1] 张辉[1] 吴伯麟[1] 袁润章[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《高等学校化学学报》2000年第11期1639-1641,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金! (批准号 :2 990 5 0 0 4);美国国际衍射数据中心 (ICDD)Grant-in-Aid基金! (No.98-10 )资助

摘　　要：A new tantalate compound KSr 2Ta 3O 10 was synthesized by solid state reaction for the first time in the ternary system K 2O SrO Ta 2O 5, and its single crystals were prepared using flux method. The chemical compositions, crystal structure, optical property, density and melting point of the new compound were characterized by EPMA, XRD, DTA and so on. KSr 2Ta 3O 10 crystallizes the orthorhombic system with unit cell parameters a= 0.784 4(1) nm, b =0.777 0(1) nm, c =3.012 7(1) nm and space group P 2 12 12 1, Z =8. The structure may be described as treble perovskite sheets [Sr 2Ta 3O 10 ] - interleaved with K +. Further, it was found that KSr 2Ta 3O 10 has intercalation phenomenon. Na +, Li +, H +, NH + 4 could exchange the interlayer cations K + of KSr 2Ta 3O 10 , and n hexylamine also could intercalate into the place between the layers of [Sr 2Ta 3O 10 ] -. [WT5HZ]A new tantalate compound KSr 2Ta 3O 10 was synthesized by solid state reaction for the first time in the ternary system K 2O SrO Ta 2O 5, and its single crystals were prepared using flux method. The chemical compositions, crystal structure, optical property, density and melting point of the new compound were characterized by EPMA, XRD, DTA and so on. KSr 2Ta 3O 10 crystallizes the orthorhombic system with unit cell parameters a= 0.784 4(1) nm, b =0.777 0(1) nm, c =3.012 7(1) nm and space group P 2 12 12 1, Z =8. The structure may be described as treble perovskite sheets [Sr 2Ta 3O 10 ] - interleaved with K +. Further, it was found that KSr 2Ta 3O 10 has intercalation phenomenon. Na +, Li +, H +, NH + 4 could exchange the interlayer cations K + of KSr 2Ta 3O 10 , and n hexylamine also could intercalate into the place between the layers of [Sr 2Ta 3O 10 ] -. [WT5HZ]

关 键 词：钽酸盐 类钙钛矿结构 合成 结构 插层特性 

分 类 号：O614.513[理学—无机化学]